Sound / by John Tyndall.

  • Tyndall, John, 1820-1893.
Date:
1883
Catalogue details

Licence: Public Domain Mark

Credit: Sound / by John Tyndall. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

    15/494 (page 9)
    PBE.FACE TO THE FOURTH EDITION. The great body of this work, dealing as it does with the immovable truths of Acoustics, remains in the present edition substantially as it was in the former ones. Various additions and corrections have, however, been made to the work. Last year I presented to the Royal Society a lengthy memoir on the ' Action of Free Molecules upon Radiant Heat, and its Conversion thereby into Sound.' A desire to describe the methods and results of this investigation in the present edition has retarded its publication. They are here briefly set forth. Last year, likewise, I communicated to the Royal Society a short paper on the ' Soundless Zones ' observed by General Duane to surround the Fog-signal Stations on the Coast of the United States. The explanation therein given of this remarkable phenomenon is reproduced and illustrated in the present work. It will, I trust, be found satisfactory. Brief descriptions of the telephones of Bell and Edison, of the microphone, and of the phonograph, are introduced.